Abstract
The rainfall and crop data were analysis of Eastern India namely Orissa, West Bengal, Assam, Jharkhand, East Uttar Pradesh, East Madhya Pradesh, Chhattisgarh and Bihar. The rainfed rice is the main crop grown in this region. The greater part of the area in eastern Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Bihar and Orissa where LGP vary from 19 to 24 weeks whereas it is only 17–18 weeks in the south western border of eastern Uttar Pradesh. It is observed that lowest productivity of less 5 q per ha in eastern Madhya Pradesh. In general, the rice yields are less than 10 q per ha in Chhattisgarh, Jharkhand, Orissa, north Bihar, western parts of Assam and northwestern portion of eastern Uttar Pradesh. The highest yield levels of 20–25 q per ha is seen in the middle parts of Uttar Pradesh and West Bengal. The productivity level remains at 10–15 q per ha in Orissa, Assam and eastern Uttar Pradesh. It is generally observed that low productivity of 1 t/ha have been mostly observed in semi-arid to dry sub-humid type of climate with LGP varying 90–120 to 120–150 days. The highest productivity of 2–3 t/ha are recorded in hot sub-humid to humid regions of West Bengal where LGP vary from 150 to 200 days. The productivity was the order of 1–2 t/ha in hot sub-humid to humid regions of Assam, Orissa and West Bengal. Also the hot dry sub-humid climates in Uttar Pradesh and Bihar recorded the productivity of 1–2 t/ha.
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